Coal supplying mechanism for stokers



June 16, 1942. H. c. CARTER 2,286,844

GOAL SUPPLYING MECHANISM FOR STOKERS Filed Sept. 13, 193'? 2Sheets-Sheet@ Ow L /NME/v TDR H. .CARTER E /4' TTURNE s/ June 16, 1942.CARTER 2,286,844`

COAL SUPPLYING MECHANISM FOR STOK'ERS l Filed sept. r13, 1937 2sheets+snee 2 H` C.. CARTER Patented June 16, 1942 G IVIECHANISM FORCOAL SUPPLYIN STO Haskell o.' carter, Peruana, ereg., assignerv te IronFireman Manufacturing Company, Portland, Oreg. v

Application September 13, 1937, Serial No. 163,595

s, claims. (ci. 25e- 4.6)

VrIhis invention relatesv generally to coalstokers, and particularly ,toa coal supplying mechanism therefor.

The main object of this invention is' the construction of a stoker and acoal supplying mechanism therefor by means of which coal may be drawnfrom a bin.

The second object is to construct a coal supplying mechanism especiallyadapted for use in stokers in which themain driving mechanism isdisposedbetween the; point of coal storage and the point of combustion.

I accomplish these and other objects in the manner setl forth in thefollowingfspecieation as illustrated in the accompanying drawings, in

which:

Fig. 1 is a perspective view of a stoker equippedv v Fig. 1.

Y with my device showing -a part of the coal bin Fig. 3 is a horizontalsection through the coal feeding worm with parts thereof in section.

Fig. 4 is a section taken along the line II-Il-in Fig. 3.

. Fig. 5 is a section taken along the line 5-5 in Fig. 1.

Similar numerals refer to similar parts throughout the several views.

Referring in detail to the drawings, there is shown a retort I0 intowhose base II extends the broken` away air duct I2 and the coal tube I3.Air is supplied to the duct I2 by means of the fan I4 which is driven bya motorv I5. Theshaft I6 of the motor I5 is providedwith astepped-pulley I1 which is in alinement with a similar pulley I8 of thetransnected by means of a chain 33. 'I'he sprocket wheel 32 is mountedon the shaft 34 of the'coal feeding-worm 25 which journals in thestandard The sprocket wheel 3I isfmounted on the shaft 35 which journalsin the standard 30 and is driven through the square coupling pin 36 fromthe transmission I9.

In order to prevent the coal from arching in the bin 23, vI haveprovided the agitatorwheels 31 which are pivotally mounted on thebearings 38 which are supported b'y the brackets 39 which rise from the.base 29. The agitator wheels 31 mesh with the coal feeding worm 25 andthe rotation thereof causes the wheels 31 :to rotate and thereby preventarchingof the coal.

It is desirable in some instances to provide a yieldable agitating arm4I! on the shaft 35 in front of the agitator wheels 31. In -otherinstances, it may bev desirable to provide more of the wheels 31 or moreof the arms 40.'

'I'he operation of. that portion of the device the shaft 35istransmitted through the sprocket wheels 3| and 32 to the same shaft 34therebyv causing the coal feeding worm 25 to rotate and conveycoal fromthe .bin 23 to the retort I0.

In order that this invention may be more clearly understood, vit isexplained that 'in the common type of coal stokers, coal is placed in arelatively small hopper and this fhopperis disposed b'emission I9. A'.belt IB-A connects the pulleys I1 and I8. A casing 20 encloses the fanI4, the

motor I5 and the transmission I9.

The tube I3 extends from the base II .to the clean-out box'il whichissecured to the plate z2 of the coal bin is whoseboaom Sides 24 slopevdownwardly toward the coal feeding worm 25 which extends from theretort I0 to the rear wall 26 of the coal bin 23. The front wall 21 ofthe coal bin .23 may be close to the casing 20 if desired. Thesidezwalls 28 may form a portion of the wall of the building in whichthe stoker is placed or may be separately made as desired.

' Referring more particularly to my invention, it

will be noted that there extends from the casing 20 a horizontal base 29uponwhose outermost end is mounted a standard 30 which is a housing forthe sprocket wheels 3| and 32 which are conare not-specificallydescribed herein;

tween the retort and the drive mechanism. The

small hopper must of course be lled as often-as it is lempty which isobjectionable from the standpoint of automatic heat requirements. By theuse of my device, it is possible to draw coal directly from the binwithout the necessity of repeatedly filling the small hopper.

It must be understood that while Ihave illustrated the shaft 35 as beingdirectly above the coal feeding wor-m 25, it may also be placed in otherrelative positions/without departing from the spirit of this invention.'

Stoker details which have no bearingon the present invention but whichhave been illustrated I claim:

l. In a stoker, a hopper consisting of an elongated,'horizontal basehaving standards at opposite ends thereof, 'a` coal feeding Wormdisposed above said base, a horizontal drive shaft disposed above saidworm and baseandin the sa'me plane T. {oFFic` at the end'thereoffarthest from the delivery end of said worm, and a hopper casingindependently enclosing said base.

2. In a stoker, a hopper consisting of an elongated, inverted,horizontal channel constituting the hopper base, an upright standardmounted at one end of said base, a coal worm having its driving endjournaling in said standard, a drive shaft having its driven endjournaling in said standard, means for drivably connecting the drivenend of said shaft with the driving end of said worin, a V shaped bracketmounted on said base, each end of said bracket having an agitatorsprocket wheel mounted thereon and meshing with said worm, the twowheels forming a V shaped saddle directly under said drive shaft and ahopper casing enclosing said sprocket wheels and coal worm independentlyof said agitating wheels.

HASKELL C. CARTER.

